部分工時勞工與正職勞工間待遇的均等，長久以來爲勞動法之 重要問題。近年來，我國從事部分時間工作之勞工人數有增加之趨 勢，因此，此問題的重要性也隨即增加，也受到許多討論。
事實上，部分工時勞工均等待遇的問題，也是日本近年來所面 臨也急欲解決之重要議題。日本於2007年對於部分工時勞動法進行 修法，一方面禁止對部分工時勞工有差別待遇，一方面在工資、教 育訓練、福利設施上，課予雇主努力義務，以確保部分工時勞工與 通常勞工間待遇均衡，對於部分工時勞工之保障有很大的進展。本 文一方面考察日本均等待遇原則之發展，一方面對我國現況進行檢 討，以提供未來法規解釋及立法之參考。

How to ensure equal treatment for part-time workers and full-time workers has been a problem faced by drafters of labor laws for a long time. In Taiwan, the number of the part-time workers has been increasing in recent years and therefore this issue has become more important and worth of more discussion.
How to ensure equal treatment for part-time workers is an important issue which there was an urgent need to resolve in Japan in recent years. Japan adopted amendments to its labor laws with respect to part-time work in 2007 which prohibited the discrimination against part-time workers and imposed requirements on the employers to treat part-time workers and the full-time workers equally in terms of salary payments, education and training and welfare benefits. Such amendments resulted in great progress in protection for part-time workers. This Article will analyze the development of the Principle of Equal Treatment in Japan and examine the current situation in Taiwan for the purpose of providing a reference for the interpretation of laws and legislation in the future.